Pneumatic implement.



M. FA BUCKMAN.

PNEUMATIC IMPLEMENT.

APmcATioN FILED APR. l2, 1915.

WITNESS A TIE/WH |V}A F, BUCKMAN.

PNEUMATIC IMPLEMENT.

APPUCAUON FILED APR.12. :915.

2 SHEETSHSHEEI 2.

WITNESS ,4 TTUR/VEY Patented Apr. 18, 1916.

UNITED STATES raTENT OFFICE.

PNEUMATIC IMPLEMENT.

Application led April 12, 1915.

To all whom t muy Genf-ern.'

Be it known that l. Mviiox F. Bi'ekxnN. citizen ot' theA llniteil States, residing at Se.- attle, in the eountvy ol King and State of Vashington. have invented a certain new and naei'ul Improvement in Pneumatic lmplements, of which the following is a Speellieation.

My invention relates to improvements in pneumatic implements whose operative parts areI adapted to he actuated hy compressed air; and the, ohjeet ot' my improvements is to provide an implement for use in the oper-I ation ol grinding valves.,y like the puppet valves ol autoniohile engines, which implement shall he adapted to he llexihly eonneet ed with a soin-ee of eompreaaed air and whieh shall emhodv a shaft with meehanism whieh may he pneumatieallv operated to impart to said shalt alternating rotar)v morementrs together with impulses wliieh tend to Cause sueeessive endwiae movements thereof, to whieh shaft i removalilv attaehed a spindle whieh is adapted to he disposed in engagement with a puppet valve. to operate to inn part sueeeK .ive impulses thereagainst while communicating alternating rotary movements thereto hiring the. operation of grind ing the engaging surfaces ot' auch puppet valve and ita seat. yl aeeomplish this ohieet hv deviees illustrated in the aeeomimnying drawings wherein Figure l is a view inside eleviition of a pneumaticl implement embodying my invern tion; Fig.' 2 ia an enlarged view in side. elevation ol a detail ot the same; Fig. 3 is an enlarged view ol. other detai .Y of the same; Fig. l is an enlarged view ot the same'in vertieal mid-section on hroken line A, A of Fig.v T. showing some partd hroken away and some internal parts in sideI elevation; Fig. 5 is a view of the san'm in horizontal erossvseetion on broken linel W, lV of Fig. 4;,Fig. f3 is a view ot the same in horizontal eroaaseetion on broken line a, .r of Fig. l; Fig. T is a view of the. saine iu horizontal eroee-aeetion on hrolv'en line y. '1/ of Fig. 4: Fig. f1 is a view ot the Same in the saule horizontal eroas-seetion on hrol in line 1 2/ of Fig. ll. and Fig. 5l is a view nl the same, in eroas-seetion or hrokl n line .2, ol' Fig. 4.

Referring to the, drawings, throughout Specification of Letters Patent.

Patented Apr. 18, 1916.

Serial No. 20,623.

whieh like referenee numerals indieate like parts, 12 is a metal portion provided with a large bore 13 and a smaller bore ll whieh extend throughout the length thereof in po sitions parallel with eaeh other and separated hy a partition l5. hoth end portions ot eaeh of said hores 13 and 1l heing provided with internal Screw-threads.

lilithin the. sorew-threznled portion of the upper end ot' the larger hore 155 ia serewed a removahle end wall 1G while within the like portion of its lower end is `erevved a removahle end wall 17. and in corresponding end portions ot. theI smaller llore l-l are eerewed. respeetively. end walll 1N aud 19.

rllhe end wall li' is provided with a eoneentrieally disposed hole through whieh a pistonaod may exteml and integrall)y disposed on its` outer aide is an outwardly pro jeeting annular flange whieh is provided with internal and external serew-threads and serewed on to said external I erew threads of said annular flange is an internail) serew-threaded end portion ot a guiding memher i2() whieh is provided with a square hole :il whieh extends longitudinally throughout itsI length.

iithin the bore 1? ie dispos-.al a piston 22 which is provided with an integral pistonrod 23 whieh extendupwardly through the end wall lo into the square hole 2l of the guiding memher 20 where it is Securely conneeted with a square hloek "il which adapted to slidahlv more within the square hole Z1 wherehv Said pistoierod may move in endwise direction without making rotary movements.

An annular packing gland-nut 25 poSed to surround'the piston-rod Q3 is disand is screwed into the internal serew-threads ot said annular lange, which projects from the outer side of the end wall 16. to engage with an annular collar 26 which may serve to eompress suitable packing whieh may he flisposed in a space 27 between said eollar 26 and an annular Seat provided in the, end wal ion block 28 secured by screws 29, which block 28 is bored and rifled to adapt it to engage with a spirally fluted spindle 30 which is disposed to extend through it to project upwardly into a hole which is provided within the piston-rod 23 whereby when the piston 22 is moved throughout its stroke within said bore 13 then said spirally fluted spindle 30 will be rotated to the extent of ninety degrees, said spindle 30 being integrally attached to the upper end of a shaft 32 which is rotatably journaled in bearings formed in the end wall 17 where it is secured from endwise movement by a collar 33 which engages with a screw-threaded collar 34 that is screwed into said end wall 17, as shown in Fig. 4. The spindle 30 by its engagement with the walls of the hole 31 in the pistonrod 23 also serves to aid in supporting said shaft 32 in its position for rotary movements.

Secured on the shaft 32 near the collar 34 by a set-screw 35 is a collar 36 and adjacent to said collar 36 on said shaft 32 is mounted a flanged sleeve 37 that may freely turn on said shaft 32. Within the underside ofthe flange portion of said sleeve 37 are formed oppositely and symmetrically dis posed cam slots 3H 'of the shape indicated by dotted lines in Vies. 7 and 8.

On the shaft Ir.' lwlow the flanged sleeve 37 and spaced thon-from is transversely d1sposed and securely fastened a bar 39 having parallel sides and curved ends, and slidably mounted in said bar 39, to extend between it and the flanged sleeve 37, are two blocks 40, disposed one on each of opposite sides of the s iat't 32, which blocks 40 are guided in their sliding movements by their side flanges which engageV with the parallel sides of said har 39. Each of said blocks 40 is provided with a stud 41 which is disposed to project into the adjacent one of the cam slots 33 whereby relative rotary movements ot' the flanged sleeve 37 and the bar 39 will actuate the blocks 40 to slide toward or from each other.

The two blocks 40 are provided with strong helical springs 42, indicated by dotted lines in Fig. 9, which tend to maintain said blocks in positions nearest to the shaft 32 whereby saidy blocks 40 may quickly be pulled toward each other whelrtheir studs 41 pass the apicesof the cam slots 38, thus to accelerate the alternating rotative movements of the flanged sleeve 37.

Within the bore 14 is disposed a rotary valve 43 whose upper end projects through the end wall 18 and whose lower end projects downwardly through the end wall 19 to extend therefrom to and through the wall of an inclosing member' 44 which serves to cover the operative mechanism comprising the flanged sleeve 37 and the blocks 40.

On the downwardly projecting portion of the valve 43 at a point adjacent to the upper side surface of the flange of the flanged sleeve 37 is secured, by a set-screw 45, an arm 46 which is provided with a slotted hole 47 extending through its end portion as more clearly shown in Figs. 7 and 3, and extending upwardly from the flanged portion of the flanged sleeve 37 is a stud 48 which projects through said slotted hole 47 whereby alternating rotative movements of the flanged sleeve 37 may be communicated to the valve 43, for instance, the travel back and forth of the piston 22 in the bore 13 will impart rotary movements alternating in direction to the shaft 32 through a distance of ninety degrees, and such alternating rota ry movements racting through the bar 39, the blocks 40, cam slots 38 of the flanged sleeve 37, the studs 41, and the arm 46) will cause the valve to make alternating rotative movements through a distance of about forty five degrees between relative positions indicated in Figs. 7 and 3.

The valve 43 is provided with a concentric longitudinal boring which serves as an exhaust passageway 49 and extending radially between such exhaust passageway 49 and the inner surface of the wall of the bore 14, within each end portion thereof, are ports 5l) and 51 disposed on lines about forty five degrees apart, and extending through the partition l5 between the bores 13 and 14 in the opposite end portions thereof, and on the same line, are ports and which register with the path traveled by ports 5() and 51, respectively, during the alternating rotative movements of the valve 43.

The valve 43 is reduced in diameter along the central portion of ils length, as more clearly shown in Fig. 2, whereby is provided an air chamber within the bore 14 and the larger end portions 54 and 55 are provided with slotted recesses 5G and 57, respectively, each of which extends from the inner edge of its respective larger end portion to such point as will cause its to form an inlet passageway from said air chamber to the respective one of the ports 52 and 53, the circumferential positions ot said slotted recesses 56 1and 57 with relation to the ports 50 and 5l and the ports 52 and are such that when the port 50 is opposite the port 52 then the slotted recess 57 will be opposite the port 53 whereby air from the bore 14 may enter the bore 13 on the under side of the piston 22 and air from the upper side of said piston 22 may escape from the bore 13 through the ports 52 and 50 and the exhaust passageway 49; and in a corresponding manner such operation will be reversed when the port 51 is opposite the port 53 and the slotted recess- 56 is opposite the port 52.

Projecting outwardly from the wall ofV the bore 14,.' rela point near its cent'al portion-is an integral nipple 58 which is provided with a passageway 59 leading into the air chamber within the bore 14 and to the outer end of said nipple 58 is connected a needle valve t5() which is adapted to be connected with a tleXible hose, not shown, that leads to a source of compressed air, and fixed in the upper side of said nipple 58 is a lubricating cup (il which is provided with a needle valve (52 which may regulate the flow of a lubricant from said cup fil into the passageway 59. there being provided within said cup (il a 4vent-tube (i2-5 through which air may pass from the passageway 5!) into said cup (il at a point above the surface of the lubricant that may be contained therein.

Attached. to the lower end of the shaft 32 is a tool holder (it within which may be secured a tool (i5 a fragment of which is shown in Fig. 1'. which tool 65 may be formed to adapt it to engage with the upper Side of a puppet valve` not shown, when such puppet valve is disposed within its seat, whereby such puppet valv-e may be moved rotatively and alternately in opposite directions during the operation of grinding the engaging surfaces of such puppet valve and its seat in response to the operation of the working parts of the implement. In the 'operation of grindimcr a valve the reciprocatory movements of the piston 22 with its attached parts causes successive variations in the downi'vardly directed pressure of the tool fifi on the puppet valve thus more readily permitting abrasive material to be distributed between the surfaces to be ground, and the action of the rifled nut Q8 .von the fiuted spindle 30 causes the tool (i5 to rotate ninety degrees in alternate opposite directions during the operation of grindimplement may be turned to different circumferential positions from time to time by manipulating the handle 66 which is secured to the upper end of the guiding member 20 as shown in Fig. 1.

The pneumatic operative parts of my invention will be readily understood by those skilled inthe art and needs no further description. Manifestly, my pneumatic implement may be employed for other purposes than-for grinding v-alves by substitilting other tools for the tool and changes may be made in the forms, dimensions and arrangement of parts of my invention without departing from the spirit thereof.

lVhat I claim is:

l. .\n implement of the class described which embodies a metal body portion provided with a c'vlimlrically formed chamber thcrewithin: a piston slidably disposed within said chamber and adapted to be movable in a lengthwise direction thereof;

means associated with Said piston and with metal body portion whereby said piston may not make rotativemovements therein; a spirally grooved member in fixed association with said piston; a tool-holding shaft provided with fins corresponding in form with the spiral grooves of said spiral/ly grooved member and rotatably associated with an end wall of said chamber so.,that said fins may engage with the grooves of said spil-ally grooved member; means associated with said metal body and with said tool-holding shaft whereby said shaft may be moved only in a circumferential direction with respect to the cylindrical Walls of said chamber: valve controlled ports extending through the wall of said chamber through which compressed fluid may pass at required times to effect reciprocatory movements of said piston whereby reciprocatory rotative movements Inay be communicated to said tool-holding shaft and.

whereby may be effected a variable tendency to force such shaft to nieve in an endwise direction, and valve-controlled means for conducting compressed fluid into said port at required different instants of time.

2. An implement of the class described which embodies a shaft adapted to be moved only in circumferential directions, means for actuating said shaft to make successive movements alternating in their directions, a rotary valve disposed with its axis parallel with said shaft and spaced therefrom, a flanged sleeve freely mounted on said shaft to be rotatable therearound, a stud fixed in the flange of said flanged sleeve to project from one side surface thereof, an arm associated with said rotary valve and disposed to be swingingly moved by a movement of said stud, two symmetrically disposed cam-slots disposed in the'other side of said flanged sleeve,f`a rectangular bar fastened on said shaft and disposed transversely thereof. two blocks slidably mounted on said rectangular bar and disposed between said bar and the cam-slotted side of said .flanged sleeve one on eachl of opposite sides of said shaft. helical tension springs disposed on said blocks to adapt them to tend to draw said blocks toward each other, and a stud fixed in one side of each of said blocks and disposed to project into a different one of said ram-slots.

3. An implement of the class described which embodies a rotatably mounted Shaft,

a flanged member mounted on said Shaft a rotin-y mha lispnn'efl with its axis parallel my nume this hird day of Apri, A. D., with the xls of Saul s111111. :1nd 5m :u'm m 1915.

h'xed alsoviution with said x'ozlry vulve and MYRON F. PHCIN. disipa-fed t0 engage 'mth Saud stud Uf Saud Wltnvsss: 5 Hamg'm] member. .Iullxsux 

